Thread-tensioning means



Nov. 17, 1925. 1,562,071

J. BARNES THREAD TENSIONING MEANS Filed July 10. 1923' Patented Nov. 17,1925.

Unirse stares JOSEPH BARNES, OF .N'EN BEDFORE, MASSACHUSETTS, ASSIGNORTG L. V. B. TENSION COMPANY, OF NEW BEDFORD, MASSACHUSETTS, ACORPORATGIT 'OF MASSACHU- SETTS.

THREAD-TENEEONENG- MEANS.

Application filed July l0, 1923.

The invention comprises various improvements which have been designedprimarily for application in connection with tension devices of the typeof those shown and described in U. S. Letters Patent No. 1,356,026,dated Oct. 19, 1920, and No. 1,393,926, dated Oct. 1 3, 1921.

Tension devices of the type just referred' to comprise a bearingsurface, bed, or backing, and a presser which is lightly borne towardsuch surface or bed, the yarn or thread passing between the two. Thelater form of device which is illustrated in Patent No. 1,393,926,comprises a weighted presserlever, and a yarn or thread-engaging presserpivotally mounted on said presseiklever adjacent the opposing surface orbed, and having a yielding face making a two-point contact with the saidsurface or bed.

One drawback in the use of tension devices in general is a tendency tocollection of lint at a tension device, alongside the running yarncorthread, portions of such lint at intervals passing onwardwith the yarnor thread and sometimes remaining in the form of slubs or slugs attachedthereto as wound, with the result that when the wound yarn is usedsubsequently in the manufacture of cloth the character and quality ofthe latter are injured by the said slubs or slugs. One object of thepresent invention is to improve the tension devices of the patentsaforesaid so as to avoid this drawback by making effective provisionadjacent the point or points of contact for escape of lint so thatitdoes not collect at such points, and consequently cannot form slubs orslugs.

Another object of the invention is to render a tension device of thetype of those yof the Letters Patent aforesaid automatically orself-threading. for adjustments to accommodate supply-` Another is toprovide Serial No. 650,637.

bobbins of different lengths. Another is to give the lpresser a.capacity to rock transversely. Another is to provide for the convenientconnection of the presser rwith the presser-lever, and disconnectiontherefrom.

The accompanying drawings show an illustrative embodiment of thefeatures ofthe invention. In the saidV diawings,-.-

Fig. 1 is a side' view of a ytension device and a stand or bracketcontaining the said features, showing also a supply-bobbin, a receivingspool, and certain parts belonging to a yarn-spooler.

Fig. 2 is a plan view of the tension device.

Fig. 3 is a view in vertical section in the plane indicated bydottedline 3,3, in Fig. 2.

Figs. t and 5, respectively, are views in section on line 4f, 4:, and 5,5, of Fig. l.

Having reference to the drawings,-

The supporting-stand or bracket comprises the main member 2, thebobbin-supporting' member 3 and the member 4 supporting the tensionmeans, the three members being combined with one another with capacityfor adjustment to accommodate bobbins of various lengths. f l

In this instance the main member 2 is provided with a notch 21 in itsfoot-portion to permit it to be mounted upon a supporting-'rod 5 in ayarn-spooler, or the like, such member being held in place on such rodby a clamping screw 6.

The bobbin-supporting member, or hanger, 3, is applied in the presentembodiment to member 2 near the lower end of member 2, and isv providedwith a short spindle 7 of suitable size and length to enter the bore ofa supply-bobbin 71. For adjusting 'the height at which the bobbin issupported, or to accommodate bobbins of different lengths, a slot 22 ismade in member 2 to receive the bolt 8 securing this hanger 6 to member2. This 'slot extends lengthwise of member 2, at a slight outwardinclination. It permits the hanger 3 toV be moved up or down iuitilcorrectly positioned, notches 23, 23, being provided in one side ofmember 2 transversely of the-slot (as indicated by dotted lines in Fig.l) to receive a rib or ribs 2st (shown by dotted lines) formed on theadjacent face of an ear of hanger 6 to hold the two parts' firmly inadjusted relations.

I provide, in addition to the provisions .described above fof'adjustingthe hanger 3 up down upon the member 2, a supplementary adjustment inthe manner of combining members 2 and Ll. To this end a slot 25 isformed in the upper end of member 2 for the bolt 26 which unites the twomembers. This slot extends longitudinally of member 2, at a slightoutward inclination, as shown. 1t permits the shifting of the clampingbolt 2G, and consequently the head with its tension device, relative tothe main stand-mem ber 2. Notches 23 and a rib or ribs 24C, shown bydotted lines, prevent accidental loss of adjustment.

The tension-producing means is located upon the head 11 of the uppermember 1, the said head having at its front end a fork constituting anopen guide 9 which is occupied by the yarn or thread c passing from thesupply-bobbin 71. The said yarn or thread passes up through the saidopen guide or fork between the two prongs or branches 91, 92, thereof.

As in Letters Patent No. 1,393,926 a plate 12 of wear-resisting materialis set flush in the top of the head, and the presser 13 of the tensionproducing means normally bears against the surface of such plate. On itsway toward the rear of the said head the yarn or thread passes betweenthe presser and the said surface. rifhe presser 13 in this instance.,like that of Patent No. 1,393,926, has the face portion 131 thereofconstituted by a resilient spring member having transverse convexbearing ribs 130, 130, to contact with the running thread or yarn, theyielding compression of the yarn between these bends and the underlyingplate 12 operating to produce friction sutiicient to establish thedesired degree of tension of the yarn as it leaves the head. Herein, asin Letters Patent No. 1,393,926, the elast-ic strip constituting theface-portion of the presser is secured at one of its ends to one end ofthe presser-body 14, the latter being pivotally mounted on a pintle 15projecting trans versely over the head, and parallel thereto, from thepresser-lever 16. This presser lever 16 is pivoted to the side of member4l at 17, just below the surface of the head, and is provided with aweight 18 which may be adjusted forward or backward along a slot 19 inthe lever to either side of the pivot 17, to add to or reduce thepressure of the resilient spring or presser 13 upon the yarn or threadbeneath it. The weight 18 is conveniently adapted to be fixed at anypoint in the slot 19 by being drilled and tapped, as shown in Fig. 5, toreceive a screw 2O having a flanged head at the back of the carryinglever, and also having its stem slabbed olil on opposite sides of itslength so that it cannot revolve in the slot 19. Thus, rotation of theweight by hand in the proper direction serves quickly and easily toclamp it tightly to the lever 16 to hold t-he weight in place upon tl elever, or loosen it to permit of adjustment of the weight along the slot19 into the relations to lever-pivot 17 required to give the desiredaction upon the yarn or thread, The features just described providingfor adjustment of the weight 18 are not claimed herein because they arethe subject of claim in my application for U. S. Letters Patent filedMar. 21, 1925, Serial No. 17,253.

To prevent the accumulation of lint from the thread or yarn at theconvex ribs 130, 139, of the presser, and guard against its subsequentadherence to the yarn in the form of slubs, l provide slots or apertures27, 28, one thereof in advance of the leading rib and the other thereofbetween the two ribs, to permit. downflow of portions of the cur rent ofair produced by the moving yarn or thread, carrying away such lint asmay work oif from the running yarn adjacent the ribs and between thepresser and the plate 12. These slots or apertures 27 28, may be of anydesired shape or disposition. In the present embodiment two such slotsor apcrtures are shown, correspending` with the number of convex ribs130, 130, provided on the particular presser illustrated, the forwardslot 27 beingl formed through'the metal of the head immediately in frontof the forward end of plate 12, for the full width of said plate; andthe aperture 28 being formed directly through the plate 12 and underlying metal of the head, intermediate the two ribs. 1t has been found inpractice that the running yarn passing over the slots or aperturescreates downward currents of air therethrough, which serve verysatisfactorily to carry any accumulated lint down with it and away fromthe yarn, clearing the yarn and the friction-creating parts of thedevice.

In the present invention 1 have combined with the tension device asdescribed above, means by which the thread or yarn from the bobbin iscaused to enter automatically between the aresser 13 and the plate 12,inerely as a result of being entered between 'the two prongs 91, 92, atthe front of the head, and drawn in a general rearward direction inbeing wound upon the receiving spool 199, Fig. 1. rlhs provision doesaway with all loss of time incident to performing the threadingoperation by hand. 1n accordance with the invention, a dciecting edge31, which may be of any suitable design and in its preferred form, asshown herein, cornprises a bent wire, entends from a point to the leftof the guide-,notch 9 between prongs' 91, 92, above the plane of thehead, across the space lying between the said prei i laterally outwardto the right aro presser 13,-thenee rearwardiy to a poivthe rear of thepresser 13, as well as c se to the said plane of the head and plate 12,having always a smooth cf tov-fard the rear of the device, and theirreversely across behind the presser2 Thus, when. the thread the yarn orthread rises away troni the plane c ot the head. This guide 32 islocated directly rearward 4ot and closely adjacent ltothe rear end ot'presser 13. The lateral extremities ot the convex ribs 130, 13G, formedon the presser preferably are beveled or rounded ofi `at the side of thepresser which is toward the detleeting edge 31, so that the thread oryarn slips easily between the presser and the plate 12 in its eiort tostraighten its line yof travel between guide 9 and the guide 32 in beingdrawnv rearwardly.

In its preferred form the device also comi bines with the detlectingedge 31 a curved guard 33 of any suitable material. preferably a wiresimilar to that used for the said deliecting et ge,and extending from apoint on the prong 91, around the presser laterally outside ot the saiddetleeting edge 31 and substantially parallel thereto. The rearwardextremity of this guard 38 is engaged with the head lat the rear of thepresser. As the yarn or thread is drawn rearwardly over the head andaround `the deiiectfing edge 31 for the purpose ot causing the device tothread itselt, this guard contines the yarn k.or thread closely to thedeflecting edge 31.

To limit the ballooning of the yarn as it unwinds from the bobbin. a web/lti is con structed on the under side of the head at one side of theline of travel ot the yarn or thread on its `way from the bobbin to theguide 9, the prong 92 in the present embodiment, in position to bestruck by the running yarn as soon as the latter begins to circle at allwidely, to thereby curbor damp the ballooning action. l

To provide for the lateral rocking aforesaid of the presser inconjunction with its longitudinal swinging movement, the presser and itssuliporting pintle or stud are fitted to each other to give the pressercapacity for suoli rocking. In this instance, as illustrated in Fig. d,the said pintle or stud is barrelsliaped in that portion thereotl onwhich the presser-body 14 is mounted, the hole through said body beingparallel-sided, or substantially so. This permits the said rocking.

The presser-body preferably is composed of a strip of spring material,steel for instance, one portion of the length thereof being bent backupon the other, as shown, a

bearing to tit :thelsu-pportmg pintzle or stud being formed by bendinglthe strip. In" this instance such bearing is produced by a bend in theback-folded upper portion of the strip. The supporting lpintle or studformed witha shoulder for engagement lwith one edge of the presser-body,and with a head at its outer end tor engagement with. the other edge ot'the presser-body, said shoulder and lhead serving to prevent the presserfrom Abecoming laterally displaced and from coming oli the supportingpintle or stud. The elasticity ot the material of the presser-bodypermits the upper. and lower portions thereof to be sprung Yapartthrough the applicationof slight torce, so as to enable the head of thesupporting .pintle or stud to pass through between such portions inmounting the presser upon the sai-d pintle .or stud, and in idismountingitgtherefrom.

What is claimed as my invention is 1. A tension device comprising, incombination, a plate yover which the yarn or thread is adapted to pass,a presser provided with la yielding tace Vplate cooperating with saidplate, said tace plate having fone or more convex ribs to press the yarnor thread aga-inst the sai-d plate, and said plate iii-st mentionedhaving :a slot or slots ladjacent the said convex rib or ribs throughwhich portions ot the current of air produced bythe traveling yarn or.thread :escape carrying with them particles of lint.

2. A tension device comprising, in combination, a plate over which theyarn is adapted to pass, a presser cooperating wit-h said plate, a yarnguide in line with said presser, means rendering the deviceseltthreading comprising a deflect-ing edge extending from a point infront of and to one side ot' the guide and above the plane of the saidplate, across in front ot' the presserto a point laterally beyond thepresser, reversely across at the rear ot the presser, and down to theplane ol the said plate and a guard commencing at the opposite side ofthe first-named guide from that on which the said detlecting edgebegins, and extending around to the rear of the presser.

3. A tension device comprising in combination, a plate, a pressercooperating with said plate` a yarn guide in front of said presser, andmeans rendering the device selfthreading comprising a deiiecting edgeeX- tending from a point in front of and to one side ot the guide andabove the plane of the said plate, across in front of the presser to apoint laterally beyond the presser, reversely across at the rear of thepresser, and down to the plane ot the said plate, with an upward bendforming a guide for the yarn after it has passed around the saiddefiecting edge and entered between the presser and plate.

4. tension device comprising, in coinbination, a plate, a presser'cooperating with said plate, a yarn guide in front of said presser,means rendering the device selfthreading comprising a ydeflecting edgeeX- tending across in front of the presser, along one side thereof, andreversely across at the rear thereof, and sloping downward to thesurface of the said plate, with an upward bend forming a yarn guide atthe rear of said presser` and a guard c mmencing at the opposite side ofthe first-named guide from that on which the said detlecting edgebegins, and extending around to the rear of the presser. Y

5. In combination, a stand or bracket adapted for attachment to aspooling machine or the like, comprising a main meinber, a bobbinsupportingmember, and a member' provided With tension means, and meanscombining both of the other members With the main member with capacityfor individual adjustment thereof to suit bobbins of varying lengths,such means comprising upper and lower slots`r bolts occupying such slotsand fastening the other two members in adjusted position upon the mainmember, and intermeshing ribs and notches upon the respective membersholding the members from turning displacement relative to one another.

6. A tension device comprising, in combination, a backing for the yarnor thread, a presser cooperating with the surface of said backing, and apresser-lever having a laterally extending pivotal stud on which saidpresser is mounted to swing, said stud shaped to permit lateral rockingof the presser in conjunction With its swinging movement.

7. A tension device comprising, in combination, a backing for the yarnor thread, a. presser-lever, and a presser cooperating with the surfaceof the said backing and engaged With the presser-lever in mannerpermitting swinging movement of the presser lengthwise of the yarn orthread and rocking movement transversely thereto.

8. A tension device comprising, in combination, a backing for the yarnor thread, a presser-mounting, and a presser having a yielding facewhich cooperates with the surface of said backing, said presser-combinedwith said mounting in manner permitting swinging movement of the presserlength- Wise of the yarn or thread and rocking movement transverselythereto.

9. A tension device comprising, in combination, a backing for the yarnor thread, a presser cooperating with the surface of said backing, and acarrying member having a laterally extending pivotal stud formed With abarrel-shaped portion on which said presser is mounted to swinglongitudinally as Well as roch transversely.

10. A tension device comprising, in combination, a backing for the yarnor thread, a presser cooperating With the surface of said backing andhaving a body portion composed of a spring strip folded back upon itselfand bent to form a transversely extending bearing, and-a headedsupporting pintle or stud, the elasticity of said spring strippermitting the head of said pintle or stud to be forced through betweenthe two portions of the strip in assembling and disassembling the parts.

I 11. A tension device of the character described comprising a headhaving a transverse presser-bearing, a presser, a presserlever havingthe presser pivotally connected therewith and also having atransverselyextending lever-pivot which occupies the saidpresser-bearing, and a screw entering a threaded axial hole in the saidlever-pivot, With a fla-nge engaging With the head to -preventaccidental transverse displacement of the presser-lever' and presser.

JOSEPH BARNES.

